The patch will be available within the next two days and the download appears here. We still wait for some tester's feedback and I'll hope that it will be good. If not then the release must be delayed and the md5 check sum is wrong.

I already give you the check sum of the file:
md5 - 7DDF2AC4E64092FF33E8FC753119FCDD

Worked smoothly on medium-low on my computer with xp.
With windows 7 howewer it's unplayable. Even on lowest, infact
it lagged about the same on medium-low as all on lowest.

Specs:

Nvidia 8600GT
Intel 1.86 Ghz (dual core)
3GB ram

same problem, but I may be due to the old dual-core. mine is also 1.8, and that's starting to be very old, + do you have win7 x64 or x86 ?
I THINK (i can't say that I really know this stuff) that the old processor is showing it's age.